[njweatherman]

Same here guys. I'm pondering on whether or not to buy the Flowmaster scavenger x pipe. I'm more interested in sound

If the AFM valves decide to rattle down the road, then I think I will buy it because the X pipe comes with a pair of AFM valves. I heard Chevy replaces the whole catback if the AFM valves break or rattle.
PPS. If you want your system even louder, pull fuse #51 and the NPP valves will stay open 24/7.

[chozn4service]

I have the X pipe and it gave me what I was wanting in sound.....


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[fredz]

can someone guide me how to attach my video of the FM exhaust set up sound? I have it from the interior only at the current time but it will help the sound curiousity.

[70chevelleSS]

Originally Posted by chozn4service

I have the X pipe and it gave me what I was wanting in sound.....


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Noticeable change from just the axleback and stock x pipe?


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[chozn4service]

Yes, very noticeable change and deep


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[MAGAUSA]

I can't imagine having this exhaust (or any) with an auto tranny since the car is constantly fighting you to put the car into whatever gear makes sense from a green new deal standpoint unless you're stretching it out. Auto trannies sound like crap when they are going through the gears compared to manuals, but that's my opinion.



With the Flowmaster American Thunder, I can notice a noise when the valves close, but it's more of a different sound than OEM. When I go outside the car, I could be convinced that the valves were slightly buzzing. But it is nothing like the DEFECTIVE GM valves that clearly rattle and can be heard from inside the car anytime the valves are closed. I still had this issue even after the dealer put their epoxy sh!t on the exhaust to fix an obvious engineering defect, that is within the emissions system. GM engineers make a collosal screw up; answer: put some silly putty in there.



I decided to buy an aftermarket axle back which I'm happy with even though it was delivered with rust and corrosion. Damn they just beat you down until you're ready to say yessa!

[KingLT1]

Originally Posted by MAGAUSA

I can't imagine having this exhaust (or any) with an auto tranny since the car is constantly fighting you to put the car into whatever gear makes sense from a green new deal standpoint unless you're stretching it out. Auto trannies sound like crap when they are going through the gears compared to manuals, but that's my opinion.



With the Flowmaster American Thunder, I can notice a noise when the valves close, but it's more of a different sound than OEM. When I go outside the car, I could be convinced that the valves were slightly buzzing. But it is nothing like the DEFECTIVE GM valves that clearly rattle and can be heard from inside the car anytime the valves are closed. I still had this issue even after the dealer put their epoxy sh!t on the exhaust to fix an obvious engineering defect, that is within the emissions system. GM engineers make a collosal screw up; answer: put some silly putty in there.



I decided to buy an aftermarket axle back which I'm happy with even though it was delivered with rust and corrosion. Damn they just beat you down until you're ready to say yessa!

You need to take a ride in my A8. It doesn't not act or sound anything like a stock A8 SS.

[KingLT1]

Originally Posted by njweatherman

Same here guys. I'm pondering on whether or not to buy the Flowmaster scavenger x pipe. I'm more interested in sound

If the AFM valves decide to rattle down the road, then I think I will buy it because the X pipe comes with a pair of AFM valves. I heard Chevy replaces the whole catback if the AFM valves break or rattle.
PPS. If you want your system even louder, pull fuse #51 and the NPP valves will stay open 24/7.

I don't want it louder...with primary cat deletes it's screams when open. I tuned my NPP valves so they open and close how I want them too in various modes. Touring and Sport the valves open above 3k rpm. Track mode I have them programmed to stay open under all conditions and gears.

My A8 doesn't shift like a stock SS anymore. I have AFM disabled and the converter doesn't lock part throttle until 8th gear @ 55mph. So all it does is shift without the extra bullshit from AFM kicking in and out or the converter locking in second gear on. I can be cruising at 35 mph, give it 1/4 throttle and rpms jump to 2400rpm and it pulls. No waiting for a converter to unlock. It's how the A8 should be but the reason why GM doesn't program it that way is due to fuel mileage. Between the Whipple, E85, and my Trans tune, I average 15mpg ,23mpg HWY. Don't care tho because it's not my daily.

[Baker]

Originally Posted by KingLT1

I don't want it louder...with primary cat deletes it's screams when open. I tuned my NPP valves so they open and close how I want them too in various modes. Touring and Sport the valves open above 3k rpm. Track mode I have them programmed to stay open under all conditions and gears.

My A8 doesn't shift like a stock SS anymore. I have AFM disabled and the converter doesn't lock part throttle until 8th gear @ 55mph. So all it does is shift without the extra bullshit from AFM kicking in and out or the converter locking in second gear on. I can be cruising at 35 mph, give it 1/4 throttle and rpms jump to 2400rpm and it pulls. No waiting for a converter to unlock. It's how the A8 should be but the reason why GM doesn't program it that way is due to fuel mileage. Between the Whipple, E85, and my Trans tune, I average 15mpg ,23mpg HWY. Don't care tho because it's not my daily.

I'm curious as to how you adjusted when the valves open and close?

[70chevelleSS]

Originally Posted by Baker

I'm curious as to how you adjusted when the valves open and close?

You can adjust these setting in HPtuners if you have the FPCM licensed


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[70chevelleSS]

Originally Posted by 70chevelleSS

You can adjust these setting in HPtuners if you have the FPCM licensed. I have mine set essentially the same as King’s.


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[KingLT1]

What 70Chevelle said.

[fredz]

I need some help in downloading the IMG video of my Flow Master system here. It won't attach. I know some have wanted to hear the audio so any help?

[chozn4service]

I have the American Thunder Flowmaster exhaust with the Scavenger X pipe and it sounds down good to me and is everything I ever wanted in an exhaust.